The "60 Minutes"team on assignment in Japan takes viewers behind the story, as the crew travels from Tokyo to the heart of the catastrophe that started with an earthquake and continues with the threat of nuclear radiation leaks. Co-producers Nicole Young and Daniel Ruetenik talk us through their experiences on the long journey, as the group comes within miles of the dangerous Fukushima Daiichi nuclear reactor plan. And "60 Minutes" correspondent Scott Pelley shares the kind of moment "reporters lose sleep over" just before he walks into gymnasium full of bodies.